What are the steps to make ng-show functional in an AngularJS application?

I am attempting to implement a hover effect where an image is displayed over another image upon hovering over its container. I have been trying to achieve this using Angular and ng-show, but for some reason, the image with the ng-show attribute remains hidden. Here's a snippet of my code:

<header class="header">
    <a routerLink="/">
        <div class="header__link" ng-controller="testCtrl"
             ng-init="show = false"
             ng-mouseenter="show = true"
             ng-mouseleave="show = false">
            <img class="header__link--logo" src="assets/img/logo2.jpeg">
            <img class="header__link--logo--hover" src="assets/img/logo2hover.jpeg"
                 ng-show="show">
            <h1 class="header__link--title">
                INMOCO
            </h1>
        </div>
    </a>
    <nav>

    </nav>
</header>
var app = angular.module("testApp", []);

console.log("app");

app.controller('testCtrl', function($scope){
    $scope.show = false;
});

I'm seeking assistance in understanding why the Angular-specific code isn't functioning as intended or if there is a simpler approach to achieving this effect. Any help would be greatly appreciated!

Answer №1

Make sure to add the ng-app directive:

<body ng-app="testApp">
    <!-- ... -->
</body>

The EXAMPLE

var app = angular.module("testApp", []);

app.controller('testCtrl', function($scope){
    $scope.show = false;
});
<script src="//unpkg.com/angular/angular.js"></script>
<body ng-app="testApp">
  <header class="header">
  <a routerLink="/">
     <div class="header__link" ng-controller="testCtrl"
             ng-init="show = false"
             ng-mouseenter="show = true"
             ng-mouseleave="show = false">
            <img class="header__link--logo" src="assets/img/logo2.jpeg">
            <img class="header__link--logo--hover" src="assets/img/logo2hover.jpeg"
                 ng-show="show">
            <h1 class="header__link--title">
                INMOCO
            </h1>
      </div>
    <nav>

    </nav>
  </header>
</body>

Answer №2

In order for the "hover" image to appear on top of the "base" image, it is necessary to apply styling with position: absolute to the images. Implementing this functionality solely in CSS by controlling the display of the image using the hover effect would be sufficient; incorporating angular for this purpose may be considered excessive.

.image {
    height: 150px;
    position: absolute;
}

.hover-image {
    display: none;
}

.image-container:hover .hover-image {
    display: initial;
}
<div class="image-container">
    <img class="image base-image" src="https://s3.amazonaws.com/pix.iemoji.com/images/emoji/apple/ios-12/256/slightly-frowning-face.png">
    <img class="image hover-image" src="https://s3.amazonaws.com/pix.iemoji.com/images/emoji/apple/ios-12/256/slightly-smiling-face.png">
</div>

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